High-dilution-ratio VOCs (Volatile Organic Compounds) sampling method

A technology with high dilution ratio and sample gas, applied in measuring devices, material analysis through optical means, instruments, etc., can solve problems such as excessive impurities, inability to guarantee accurate measurement of sample gas, large loss of sample gas, etc., and achieve accurate collection The effect of the sample

Pending Publication Date: 2022-03-18
北京乐氏联创科技有限公司
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Problems solved by technology

[0004] The present invention provides a VOCs sampling method with a high dilution ratio, which is used to solve the problem of large sample gas loss caused by too many impurities in the sample gas collection process of the existing VOCs sampling, and the problem that the accurate measurement of the sample gas cannot be guaranteed. The technical solution adopted as follows:

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[0052] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0053] A high dilution ratio VOCs sampling method proposed by the present invention is used to solve the problem that the sample gas is lost due to too many impurities in the sample gas collection process of the existing VOCs sampling, and the accurate measurement of the sample gas cannot be guaranteed.

[0054] A kind of high dilution ratio VOCs sampling method that the embodiment of the present invention proposes, such as figure 1 As shown, the sampling method includes:

[0055]Step 1, connecting the sampling probe with the sampling source through the heating pipeline and the starting device;

[0056] Step 2. Heat the sampling probe and the heating pipeline. When...

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Abstract

The invention provides a method for sampling VOCs (Volatile Organic Compounds) with a high dilution ratio. The method comprises the following steps: step 1, communicating a sampling probe gun with a sampling source through a heating pipeline and a starting device; 2, heating the sampling probe gun and the heating pipeline, and when the heating pipeline is heated to 130 DEG C or above, starting an air pump and opening diluent gas; 3, adjusting the air flow of the input sample gas, and sampling the sample gas according to the air flow adjustment; 4, monitoring the temperature change of the sample gas extracted by the gas pump in real time; 5, setting the dilution ratio of the sample gas, introducing diluent gas into the sample gas, and regulating and controlling the flow velocity of the diluent gas according to the dilution ratio of the sample gas; and step 6, storing the sample gas in a gas storage device.

Description

technical field [0001] The invention provides a high dilution ratio VOCs sampling method, which belongs to the technical field of smoke detection. Background technique [0002] The iron and steel industry is a heavy polluting enterprise with special processes, pollutants VOC S There are both organized and unorganized emissions. VOCs S It is the main cause of photochemical smog. At present, VOC from fixed pollution sources abroad S Both the total item and the sub-items are tested and all use online methods. The domestic online technology can only measure VOC S Total items and some benzene series, for sub-item research or manual sampling laboratory analysis method, for VOC in steel industry S The sampling methods, equipment and standards are basically blank. Based on the problems of high dust particle content, high water vapor content, and high oil content in the iron and steel industry process technology or fixed pollution source VOC sampling detection, a high-temperatu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504G01N21/01
CPCG01N21/3504G01N21/01G01N2021/0112
Inventor 孙利红赵新李永军乐嫣朱豪杰
Owner 北京乐氏联创科技有限公司
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